Solidsclarifcation Unit is used for water based mud cutting treatment.The function is similar like the Vertical Cutting Dryer or HI-G vertical Cutting Dryer which used for drying the solids from oil based drilling mud cuttings.
Solidsclarification Unit drying the cuttings into water and tranportalble cake of drilling cutting for further treatment.
For more info. about the solids clarification unit and drilling waste management equipment,please go to GN Solids Control website.
High G dryer (high G dryer) and vertical cutting dryer (vatex dryer) are the main equipmetn of waste management system.
Many clients cannot well tell the difference of them.
From function:
High G dryer (high G dryer) is mainly used for water base drilling cuttings. Like GNZS853 high G shaker. 
Vertical cutting dryer (vatex dryer) is mainly used for oil base mud. With water base cutting, cannot work well.
Regarding cost, vertical cutting dryer is a relative expensive equipment compared with high G shaker.
Users can shoose right equipment according to his own mud condition.
Many clients request make shaker screens per API standard, and screen label and tag format should be accordance with API RP13C. 
World top screen manufacturer – GN Solids Control do international market well and know international market standard well.
The manufacturer may use two screen tags on the screen panel in order to include supplemental information deemed necessary provided that:
1) the style of font remains identical on all screen tags;
2) the API Screen Designation is displayed on the same tag as the manufacturer’s screen designation;
3) the size of the API Screen Designation is at least twice the size of the manufacturer’s screen designation;
4) all information contained with the screen designation system may be of a single, legible font style of manufacturer’s choosing.
As the only one China manufacturer on complete line solids control and waste management, there are many clients inquire GN about waste management system.
Below is the general recommondation from GN:
1) for oil based mud : 1 ea GNCD930 extractor + 1 ea GNLW363G decanter centrifuge
2) for water based mud: 1 ea GNZS853 high G shale shaker + 1 ea GNLW363G decanter centrifuge
It is the most basic and effective proposal.Clients can choose other equipments accordingly.
Drilling waste extractor is mainly used for oil based mud, worked together with dewatering centrifuge (GNLW series). 
Drilling waste extractor is mainly used to further recover drilling fluids from oil based drilling cuttings. It can recover valuable fluids from drilling waste, reduce drilling cost.
And the extractor can reduce water content in drilling cuttings, enlarge treating capacity of next step machine.